Distributed Controllers for Multiterminal HVDC Transmission Systems

Andreasson, Martin; Dimarogonas, Dimos V.; Johansson, Karl Henrik

doi:10.1109/tcns.2016.2535105

Cited by 31 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the first case study, we consider district heating systems (Scholten et al [2015]) and improve upon existing results by guaranteeing asymptotic convergence to a desired setpoint, where only a subset of the nodes are required to have a controllable input. In the second case study, we consider voltage regulation and current sharing in multi-terminal high voltage direct current (HVDC) networks (Zonetti et al [2015], Andreasson et al [2016]). Despite the fact that these networks have already been studied extensively, the proposed control solution is noteworthy in that it provides means to limit current injections during transients and does not require all terminals to be controlled.…”

Section: Main Contributionsmentioning

confidence: 99%

Optimal regulation of flow networks with transient constraints

2019

View full text Add to dashboard Cite

This paper investigates the control of flow networks, where the control objective is to regulate the measured output (e.g storage levels) towards a desired value. We present a distributed controller that dynamically adjusts the inputs and flows, to achieve output regulation in the presence of unknown disturbances, while satisfying given input and flow constraints. Optimal coordination among the inputs, minimizing a suitable cost function, is achieved by exchanging information over a communication network. Exploiting an incremental passivity property, the desired steady state is proven to be globally asymptotically attractive under the closed loop dynamics. Two case studies (a district heating system and a multi-terminal HVDC network) show the effectiveness of the proposed solution.

show abstract

Section: Main Contributionsmentioning

confidence: 99%

Optimal regulation of flow networks with transient constraints

2019

View full text Add to dashboard Cite

show abstract

“…In this section we propose a distributed controller inspired by [21] and [26]. The concept of network emulation can be carried further with the aid of distributed communication.…”

Section: B Distributed Secondary Controlmentioning

confidence: 99%

Frequency and voltage control of hybrid AC/DC networks

Watson

Lestas

2018

2018 IEEE Conference on Decision and Control (CDC)

View full text Add to dashboard Cite

Hybrid AC/DC networks are a key technology for future electrical power systems, due to the increasing number of converter-based loads and distributed energy resources. In this paper, we consider the design of control schemes for hybrid AC/DC networks, focusing especially on the control of the interlinking converters (ILC(s)). We present two control schemes: firstly for decentralized primary control, and secondly, a distributed secondary controller. In the primary case, the stability of the controlled system is proven in a general hybrid AC/DC network which may include asynchronous AC subsystems. Furthermore, it is demonstrated that power-sharing across the AC/DC network is significantly improved compared to previously proposed dual droop control. The proposed scheme for secondary control guarantees the convergence of the AC system frequencies and the average DC voltage of each DC subsystem to their nominal values respectively. An optimal power allocation is also achieved at steady-state. The applicability and effectiveness of the proposed algorithms are verified by simulation on a test hybrid AC/DC network in MATLAB / Simscape Power Systems.

show abstract

“…, n, the controller (11) reduces to the droop controller (5). If however V i = V nom i = V i , the controller (11) reduces to the decentralized PI controller (9).…”

Section: Assumption 1 the Nominal Voltages Satisfymentioning

confidence: 99%

“…An inherent disadvantage of proportional control is the presence of static control errors, and the voltage droop controller is no exception. To eliminate static control errors induced by proportional voltage droop controllers, several distributed secondary controllers have been proposed for MTDC systems [8], [9]. Existing secondary control schemes for MTDC systems are however, with few exceptions, distributed (with local communication) or centralized, in the sense that local controllers need access to remote state information.…”

Section: Introductionmentioning

confidence: 99%

Dynamical decentralized voltage control of multi-terminal HVDC grids

Andreasson

2016

2016 European Control Conference (ECC)

Self Cite

View full text Add to dashboard Cite

Abstract-High-voltage direct current (HVDC) is a commonly used technology for long-distance electric power transmission, mainly due to its low resistive losses. When connecting multiple HVDC lines into a multi-terminal HVDC (MTDC) system, several challenges arise. To ensure safe and efficient operation of MTDC systems, the voltage of all terminals need to be steered to within an operational range. In this paper we study the commonly used decentralized voltage droop controller, and show that it in general does not steer the voltages to within the operational range. We propose a decentralized PI controller with deadband, and show that it always steers the voltages to within the operational range regardless of the loads. Additionally we show that the proposed controller inherits the property of proportional power sharing from the droop controller, provided that both the loads and the line resistances are sufficiently low. The results are validated through simulation in MATLAB.

show abstract

Distributed Controllers for Multiterminal HVDC Transmission Systems

Cited by 31 publications

References 22 publications

Optimal regulation of flow networks with transient constraints

Optimal regulation of flow networks with transient constraints

Frequency and voltage control of hybrid AC/DC networks

Dynamical decentralized voltage control of multi-terminal HVDC grids

Contact Info

Product

Resources

About